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    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav></div></header> <div class="sidebar-mask"></div> <div class="sidebar-hover-trigger"></div> <aside class="sidebar" style="display:none;"><!----> <nav class="nav-links"><div class="nav-item"><a href="/vdoing-demo-repository/" class="nav-link">首页</a></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Python" class="dropdown-title"><a href="/vdoing-demo-repository/python/" class="link-title">Python</a> <span class="title" style="display:none;">Python</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><h4>Python</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/vdoing-demo-repository/pages/c438df/" class="nav-link">Python基础</a></li></ul></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="前端" class="dropdown-title"><a href="/vdoing-demo-repository/web/" class="link-title">前端</a> <span class="title" style="display:none;">前端</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><h4>前端文章</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/vdoing-demo-repository/pages/8143cc480faf9a11/" class="nav-link">JavaScript</a></li><li class="dropdown-subitem"><a href="/vdoing-demo-repository/pages/802a1ca6f7b71c59/" class="nav-link">Vue</a></li></ul></li><li class="dropdown-item"><h4>学习笔记</h4> <ul class="dropdown-subitem-wrapper"><li class="dropdown-subitem"><a href="/vdoing-demo-repository/note/javascript/" class="nav-link">《JavaScript教程》笔记</a></li><li class="dropdown-subitem"><a href="/vdoing-demo-repository/note/es6/" class="nav-link">《ES6 教程》笔记</a></li><li class="dropdown-subitem"><a href="/vdoing-demo-repository/note/vue/" class="nav-link">《Vue》笔记</a></li><li class="dropdown-subitem"><a href="/vdoing-demo-repository/note/typescript-axios/" aria-current="page" class="nav-link router-link-exact-active router-link-active">《TypeScript 从零实现 axios》</a></li><li class="dropdown-subitem"><a href="/vdoing-demo-repository/note/wx-miniprogram/" class="nav-link">小程序笔记</a></li></ul></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="页面" class="dropdown-title"><a href="/vdoing-demo-repository/ui/" class="link-title">页面</a> <span class="title" style="display:none;">页面</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/8309a5b876fc95e3/" class="nav-link">HTML</a></li><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/0a83b083bdf257cb/" class="nav-link">CSS</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="技术" class="dropdown-title"><a href="/vdoing-demo-repository/technology/" class="link-title">技术</a> <span class="title" style="display:none;">技术</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/9a7ee40fc232253e/" class="nav-link">技术文档</a></li><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/4c778760be26d8b3/" class="nav-link">GitHub技巧</a></li><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/117708e0af7f0bd9/" class="nav-link">Nodejs</a></li><li class="dropdown-item"><!----> <a href="/vdoing-demo-repository/pages/41f87d890d0a02af/" class="nav-link">博客搭建</a></li></ul></div></div><div class="nav-item"><a href="/vdoing-demo-repository/archives/" class="nav-link">归档</a></div> <a href="https://github.com/xugaoyi/vuepress-theme-vdoing" target="_blank" rel="noopener noreferrer" class="repo-link">
    GitHub
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>JavaScript文章</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Vue文章</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>学习笔记</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/vdoing-demo-repository/note/javascript/" class="sidebar-link">《JavaScript教程》笔记</a></li><li><a href="/vdoing-demo-repository/note/es6/" class="sidebar-link">《ES6 教程》笔记</a></li><li><a href="/vdoing-demo-repository/note/vue/" class="sidebar-link">《Vue》笔记</a></li><li><a href="/vdoing-demo-repository/note/typescript-axios/" aria-current="page" class="active sidebar-link">《TypeScript 从零实现 axios》</a></li><li><a href="/vdoing-demo-repository/note/wx-miniprogram/" class="sidebar-link">小程序笔记</a></li></ul></section></li></ul> </aside> <div><main class="page"><div class="theme-vdoing-wrapper "><div class="placeholder"></div> <div class="theme-vdoing-content theme-vdoing-content" data-v-2cf874fa><div class="column-wrapper" data-v-2cf874fa><img src="https://cdn.jsdelivr.net/gh/xugaoyi/image_store/blog/20200105104632.png" data-v-2cf874fa> <dl class="column-info" data-v-2cf874fa><dt class="title" data-v-2cf874fa>《TypeScript 从零实现 axios》</dt> <dd class="description" data-v-2cf874fa>学习使用 TypeScript 从零实现 axios 库</dd></dl></div> <div class="catalogue-wrapper" data-v-2cf874fa><div class="catalogue-title" data-v-2cf874fa>目录</div> <div class="catalogue-content" data-v-2cf874fa><dl data-v-2cf874fa><dt id="初识 TypeScript" data-v-2cf874fa><a href="#初识 TypeScript" class="header-anchor" data-v-2cf874fa>#</a>
            1. 初识 TypeScript
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/e05dce83e5129785" data-v-2cf874fa>1-1. 简介
                  <!----></a><a href="/vdoing-demo-repository/pages/064e0f7b6b6142c8" data-v-2cf874fa>1-2. 安装 TypeScript
                  <!----></a><a href="/vdoing-demo-repository/pages/c85249f40e7a3517" data-v-2cf874fa>1-3. 编写第一个 TypeScript 程序
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="TypeScript 常用语法" data-v-2cf874fa><a href="#TypeScript 常用语法" class="header-anchor" data-v-2cf874fa>#</a>
            2. TypeScript 常用语法
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/28672e2743bbc3a7" data-v-2cf874fa>2-1. 基础类型
                  <!----></a><a href="/vdoing-demo-repository/pages/54add7f5cf78088e" data-v-2cf874fa>2-2. 变量声明
                  <!----></a><a href="/vdoing-demo-repository/pages/54ea89b497ec3bb3" data-v-2cf874fa>2-3. 接口
                  <!----></a><a href="/vdoing-demo-repository/pages/fad060bd9a8bfac6" data-v-2cf874fa>2-4. 类
                  <!----></a><a href="/vdoing-demo-repository/pages/870a51ba2a9edfad" data-v-2cf874fa>2-5. 函数
                  <!----></a><a href="/vdoing-demo-repository/pages/8045759ec4ad3c01" data-v-2cf874fa>2-6. 泛型
                  <!----></a><a href="/vdoing-demo-repository/pages/7279420c899c505d" data-v-2cf874fa>2-7. 类型推断
                  <!----></a><a href="/vdoing-demo-repository/pages/3fb6c2f52ab398e3" data-v-2cf874fa>2-8. 高级类型
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 项目初始化" data-v-2cf874fa><a href="#ts-axios 项目初始化" class="header-anchor" data-v-2cf874fa>#</a>
            3. ts-axios 项目初始化
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/195af93fcc871b8b" data-v-2cf874fa>3-1. 需求分析
                  <!----></a><a href="/vdoing-demo-repository/pages/6e11ac76475a2b3e" data-v-2cf874fa>3-2. 初始化项目
                  <!----></a><a href="/vdoing-demo-repository/pages/acfe1e0b401fa984" data-v-2cf874fa>3-3. 编写基础请求代码
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 基础功能实现" data-v-2cf874fa><a href="#ts-axios 基础功能实现" class="header-anchor" data-v-2cf874fa>#</a>
            4. ts-axios 基础功能实现
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/1313dae575f6dddf" data-v-2cf874fa>4-1. 处理请求 url 参数
                  <!----></a><a href="/vdoing-demo-repository/pages/887cd0918e2543d8" data-v-2cf874fa>4-2. 处理请求 body 数据
                  <!----></a><a href="/vdoing-demo-repository/pages/35c0ec1bb0b0faaf" data-v-2cf874fa>4-3. 处理请求 header
                  <!----></a><a href="/vdoing-demo-repository/pages/a57debe141e1e4f4" data-v-2cf874fa>4-4. 获取响应数据
                  <!----></a><a href="/vdoing-demo-repository/pages/927161662ca32c24" data-v-2cf874fa>4-5. 处理响应 header
                  <!----></a><a href="/vdoing-demo-repository/pages/922cb4268499dc3f" data-v-2cf874fa>4-6. 处理响应 data
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 异常情况处理" data-v-2cf874fa><a href="#ts-axios 异常情况处理" class="header-anchor" data-v-2cf874fa>#</a>
            5. ts-axios 异常情况处理
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/6a8bef7b98dfdcf9" data-v-2cf874fa>5-1. 错误处理
                  <!----></a><a href="/vdoing-demo-repository/pages/22d581d8c2860b8a" data-v-2cf874fa>5-2. 错误信息增强
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 接口扩展" data-v-2cf874fa><a href="#ts-axios 接口扩展" class="header-anchor" data-v-2cf874fa>#</a>
            6. ts-axios 接口扩展
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/034e320f4af88bd4" data-v-2cf874fa>6-1. 扩展接口
                  <!----></a><a href="/vdoing-demo-repository/pages/8af227eae851ec97" data-v-2cf874fa>6-2. axios 函数重载
                  <!----></a><a href="/vdoing-demo-repository/pages/c4489d0bab02cc0c" data-v-2cf874fa>6-3. 响应数据支持泛型
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 拦截器实现" data-v-2cf874fa><a href="#ts-axios 拦截器实现" class="header-anchor" data-v-2cf874fa>#</a>
            7. ts-axios 拦截器实现
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/70651900f022f586" data-v-2cf874fa>7-1. 拦截器设计与实现
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 配置化实现" data-v-2cf874fa><a href="#ts-axios 配置化实现" class="header-anchor" data-v-2cf874fa>#</a>
            8. ts-axios 配置化实现
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/937e4de6b81edeca" data-v-2cf874fa>8-1. 合并配置的设计与实现
                  <!----></a><a href="/vdoing-demo-repository/pages/f5b627bfebba87fc" data-v-2cf874fa>8-2. 请求和响应配置化
                  <!----></a><a href="/vdoing-demo-repository/pages/7b49658c26f613bf" data-v-2cf874fa>8-3. 扩展 create 静态接口
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 取消功能实现" data-v-2cf874fa><a href="#ts-axios 取消功能实现" class="header-anchor" data-v-2cf874fa>#</a>
            9. ts-axios 取消功能实现
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/fdc6da5372397430" data-v-2cf874fa>9-1. 取消功能的设计与实现
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 更多功能实现" data-v-2cf874fa><a href="#ts-axios 更多功能实现" class="header-anchor" data-v-2cf874fa>#</a>
            10. ts-axios 更多功能实现
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/5dce43eba796a2ab" data-v-2cf874fa>10-1. withCredentials
                  <!----></a><a href="/vdoing-demo-repository/pages/390cb70e2b619449" data-v-2cf874fa>10-2. XSRF 防御
                  <!----></a><a href="/vdoing-demo-repository/pages/1376fd897809036e" data-v-2cf874fa>10-3. 上传和下载的进度监控
                  <!----></a><a href="/vdoing-demo-repository/pages/89cd6496c23159ae" data-v-2cf874fa>10-4. HTTP 授权
                  <!----></a><a href="/vdoing-demo-repository/pages/40b41ce8e8159567" data-v-2cf874fa>10-5. 自定义合法状态码
                  <!----></a><a href="/vdoing-demo-repository/pages/7753b8141663e54a" data-v-2cf874fa>10-6. 自定义参数序列化
                  <!----></a><a href="/vdoing-demo-repository/pages/0b9f2ee2b4dbb728" data-v-2cf874fa>10-7. baseURL
                  <!----></a><a href="/vdoing-demo-repository/pages/c26b053540a7dafa" data-v-2cf874fa>10-8. 静态方法扩展
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 单元测试" data-v-2cf874fa><a href="#ts-axios 单元测试" class="header-anchor" data-v-2cf874fa>#</a>
            11. ts-axios 单元测试
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/df36888424843793" data-v-2cf874fa>11-1. 前言
                  <!----></a><a href="/vdoing-demo-repository/pages/bf5c625a35757b37" data-v-2cf874fa>11-2. Jest 安装和配置
                  <!----></a><a href="/vdoing-demo-repository/pages/13f147a9b355c4c1" data-v-2cf874fa>11-3. 辅助模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/e1d15dec8634e6b5" data-v-2cf874fa>11-4. 请求模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/ddd86ec39b5dfe33" data-v-2cf874fa>11-5. headers 模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/2eac7a0a0d644c15" data-v-2cf874fa>11-6. Axios 实例模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/97de6fd6293a2c6e" data-v-2cf874fa>11-7. 拦截器模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/cdf59840306f9e81" data-v-2cf874fa>11-8. mergeConfig 模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/6fa16aee29527032" data-v-2cf874fa>11-9. 请求取消模块单元测试
                  <!----></a><a href="/vdoing-demo-repository/pages/9572134781ba6a25" data-v-2cf874fa>11-10. 剩余模块单元测试
                  <!----></a></dd></dl><dl data-v-2cf874fa><dt id="ts-axios 部署与发布" data-v-2cf874fa><a href="#ts-axios 部署与发布" class="header-anchor" data-v-2cf874fa>#</a>
            12. ts-axios 部署与发布
          </dt> <dd data-v-2cf874fa><a href="/vdoing-demo-repository/pages/3e5d5a45ad50f198" data-v-2cf874fa>12-1. ts-axios 编译与发布
                  <!----></a><a href="/vdoing-demo-repository/pages/c6bdbd5bd60adf5a" data-v-2cf874fa>12-2. 引用 ts-axios 库
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